<template>
  <div>
    <table border="1" width="700" style="border-collapse: collapse">
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th><input type="checkbox" v-model="isAll" /> <span>全选</span></th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>
      <tbody>
        <TrList
          v-for="(item, index) in goodList"
          :key="index"
          @jbtn="jFn"
          @addbtn="addFn"
          @delbtn="delFn"
          :obj="item"
          :index="index"
        >
        </TrList>
      </tbody>
      <tfoot>
        <!-- <tr>
          <td>合计:</td>
          <td colspan="5">{{}}</td>
        </tr> -->
        <Sum :arr="goodList" />
      </tfoot>
    </table>
  </div>
</template>

<script>
import TrList from './components/TrList.vue';
import Sum from './components/Sum.vue'
export default {
  components: {
    TrList,
    Sum,
  },
  data() {
    return {
      goodList: [
        {
          name: "诸葛亮",
          price: 1000,
          num: 1,
          checked: false,
        },
        {
          name: "蔡文姬",
          price: 1500,
          num: 1,
          checked: false,
        },
        {
          name: "妲己",
          price: 2000,
          num: 1,
          checked: false,
        },
        {
          name: "鲁班",
          price: 2200,
          num: 1,
          checked: false,
        },
      ],
    };
  },
  methods: {
    addFn(index, num) {
      this.goodList[index].num += 1
    },
    jFn(index, num) {
      this.goodList[index].num && (this.goodList[index].num = this.goodList[index].num - 1).toFixed(2)
    },
    delFn(index) {
      this.goodList.splice(this.goodList[index], 1)
    }
  },
  computed: {
    isAll: {
      set(val) {
        this.goodList.forEach((item) => (item.checked = val));
      },
      get() {
        return this.goodList.every((item) => item.checked);
      },
    },
  }
};
</script>

<style>
</style>